Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2927:2133d2d300fd
SetDrawColor() and SetDrawBlendMode() are optional
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 30 Dec 2008 07:14:11 +0000 |
| parents | a0c837a16e4c |
| children | ff602fdfdedc |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 #ifdef __SSE2__ |
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37 #include <emmintrin.h> |
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38 #endif |
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39 |
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40 #include "SDL_cpuinfo.h" |
| 0 | 41 #include "SDL_endian.h" |
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42 #include "SDL_video.h" |
| 0 | 43 |
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44 /* SDL blit copy flags */ |
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45 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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46 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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47 #define SDL_COPY_MASK 0x00000010 |
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48 #define SDL_COPY_BLEND 0x00000020 |
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49 #define SDL_COPY_ADD 0x00000040 |
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50 #define SDL_COPY_MOD 0x00000080 |
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51 #define SDL_COPY_COLORKEY 0x00000100 |
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52 #define SDL_COPY_NEAREST 0x00000200 |
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53 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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54 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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55 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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56 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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57 |
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58 /* SDL blit CPU flags */ |
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59 #define SDL_CPU_ANY 0x00000000 |
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60 #define SDL_CPU_MMX 0x00000001 |
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61 #define SDL_CPU_3DNOW 0x00000002 |
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62 #define SDL_CPU_SSE 0x00000004 |
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63 #define SDL_CPU_SSE2 0x00000008 |
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64 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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65 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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66 |
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67 typedef struct |
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68 { |
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69 Uint8 *src; |
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70 int src_w, src_h; |
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71 int src_pitch; |
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72 int src_skip; |
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73 Uint8 *dst; |
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74 int dst_w, dst_h; |
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75 int dst_pitch; |
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76 int dst_skip; |
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77 SDL_PixelFormat *src_fmt; |
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78 SDL_PixelFormat *dst_fmt; |
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79 Uint8 *table; |
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80 int flags; |
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81 Uint32 colorkey; |
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82 Uint8 r, g, b, a; |
| 0 | 83 } SDL_BlitInfo; |
| 84 | |
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85 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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86 |
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87 typedef struct |
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88 { |
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89 Uint32 src_format; |
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90 Uint32 dst_format; |
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91 int flags; |
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92 int cpu; |
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93 SDL_BlitFunc func; |
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94 } SDL_BlitFuncEntry; |
| 0 | 95 |
| 96 /* Blit mapping definition */ | |
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97 typedef struct SDL_BlitMap |
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98 { |
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99 SDL_Surface *dst; |
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100 int identity; |
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101 SDL_blit blit; |
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102 void *data; |
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103 SDL_BlitInfo info; |
| 0 | 104 |
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105 /* the version count matches the destination; mismatch indicates |
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106 an invalid mapping */ |
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107 unsigned int format_version; |
| 0 | 108 } SDL_BlitMap; |
| 109 | |
| 110 /* Functions found in SDL_blit.c */ | |
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111 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 112 |
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113 /* Functions found in SDL_blit_*.c */ |
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114 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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117 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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118 |
| 0 | 119 /* |
| 120 * Useful macros for blitting routines | |
| 121 */ | |
| 122 | |
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123 #if defined(__GNUC__) |
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124 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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125 #elif defined(_MSC_VER) |
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126 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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127 #else |
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128 #define DECLARE_ALIGNED(t,v,a) t v |
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129 #endif |
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130 |
| 0 | 131 #define FORMAT_EQUAL(A, B) \ |
| 132 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 133 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 134 | |
| 135 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 136 /* FIXME: rescale values to 0..255 here? */ | |
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137 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 138 { \ |
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139 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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140 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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141 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 142 } |
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143 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 144 { \ |
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145 r = (((Pixel&0xF800)>>11)<<3); \ |
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146 g = (((Pixel&0x07E0)>>5)<<2); \ |
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147 b = ((Pixel&0x001F)<<3); \ |
| 0 | 148 } |
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149 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 150 { \ |
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151 r = (((Pixel&0x7C00)>>10)<<3); \ |
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152 g = (((Pixel&0x03E0)>>5)<<3); \ |
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153 b = ((Pixel&0x001F)<<3); \ |
| 0 | 154 } |
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155 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 156 { \ |
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157 r = ((Pixel&0xFF0000)>>16); \ |
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158 g = ((Pixel&0xFF00)>>8); \ |
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159 b = (Pixel&0xFF); \ |
| 0 | 160 } |
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161 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 162 do { \ |
| 163 switch (bpp) { \ | |
| 164 case 2: \ | |
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165 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 166 break; \ |
| 167 \ | |
| 168 case 3: { \ | |
| 169 Uint8 *B = (Uint8 *)(buf); \ | |
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170 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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171 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 172 } else { \ |
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173 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 174 } \ |
| 175 } \ | |
| 176 break; \ | |
| 177 \ | |
| 178 case 4: \ | |
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179 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 180 break; \ |
| 181 \ | |
| 182 default: \ | |
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183 Pixel; /* stop gcc complaints */ \ |
| 0 | 184 break; \ |
| 185 } \ | |
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186 } while (0) |
| 0 | 187 |
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188 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 189 do { \ |
| 190 switch (bpp) { \ | |
| 191 case 2: \ | |
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192 Pixel = *((Uint16 *)(buf)); \ |
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193 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 194 break; \ |
| 195 \ | |
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196 case 3: { \ |
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197 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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198 r = *((buf)+fmt->Rshift/8); \ |
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199 g = *((buf)+fmt->Gshift/8); \ |
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200 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 201 } else { \ |
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202 r = *((buf)+2-fmt->Rshift/8); \ |
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203 g = *((buf)+2-fmt->Gshift/8); \ |
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204 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 205 } \ |
| 206 } \ | |
| 207 break; \ | |
| 208 \ | |
| 209 case 4: \ | |
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210 Pixel = *((Uint32 *)(buf)); \ |
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211 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 212 break; \ |
| 213 \ | |
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214 default: \ |
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215 Pixel; /* stop gcc complaints */ \ |
| 0 | 216 break; \ |
| 217 } \ | |
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218 } while (0) |
| 0 | 219 |
| 220 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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221 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 222 { \ |
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223 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 224 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 225 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 226 } | |
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227 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 228 { \ |
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229 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 230 } |
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231 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 232 { \ |
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233 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 234 } |
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235 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 236 { \ |
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237 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 238 } |
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239 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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240 { \ |
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241 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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242 } |
| 0 | 243 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 244 { \ | |
| 245 switch (bpp) { \ | |
| 246 case 2: { \ | |
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247 Uint16 Pixel; \ |
| 0 | 248 \ |
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249 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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250 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 251 } \ |
| 252 break; \ | |
| 253 \ | |
| 254 case 3: { \ | |
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255 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 256 *((buf)+fmt->Rshift/8) = r; \ |
| 257 *((buf)+fmt->Gshift/8) = g; \ | |
| 258 *((buf)+fmt->Bshift/8) = b; \ | |
| 259 } else { \ | |
| 260 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 261 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 262 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 263 } \ | |
| 264 } \ | |
| 265 break; \ | |
| 266 \ | |
| 267 case 4: { \ | |
|
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268 Uint32 Pixel; \ |
| 0 | 269 \ |
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270 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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271 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 272 } \ |
| 273 break; \ | |
| 274 } \ | |
| 275 } | |
| 276 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 277 { \ | |
| 278 switch (bpp) { \ | |
| 279 case 2: { \ | |
| 280 Uint16 *bufp; \ | |
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281 Uint16 Pixel; \ |
| 0 | 282 \ |
| 283 bufp = (Uint16 *)buf; \ | |
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284 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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285 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 286 } \ |
| 287 break; \ | |
| 288 \ | |
| 289 case 3: { \ | |
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290 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 291 *((buf)+fmt->Rshift/8) = r; \ |
| 292 *((buf)+fmt->Gshift/8) = g; \ | |
| 293 *((buf)+fmt->Bshift/8) = b; \ | |
| 294 } else { \ | |
| 295 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 296 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 297 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 298 } \ | |
| 299 } \ | |
| 300 break; \ | |
| 301 \ | |
| 302 case 4: { \ | |
| 303 Uint32 *bufp; \ | |
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304 Uint32 Pixel; \ |
| 0 | 305 \ |
| 306 bufp = (Uint32 *)buf; \ | |
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307 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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308 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 309 } \ |
| 310 break; \ | |
| 311 } \ | |
| 312 } | |
| 313 | |
| 314 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
|
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315 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 316 { \ |
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317 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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318 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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319 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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320 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 321 } |
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322 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 323 { \ |
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324 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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325 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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326 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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327 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 328 } |
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329 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 330 { \ |
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331 r = (Pixel>>24); \ |
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332 g = ((Pixel>>16)&0xFF); \ |
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333 b = ((Pixel>>8)&0xFF); \ |
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334 a = (Pixel&0xFF); \ |
| 0 | 335 } |
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336 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 337 { \ |
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338 r = ((Pixel>>16)&0xFF); \ |
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339 g = ((Pixel>>8)&0xFF); \ |
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340 b = (Pixel&0xFF); \ |
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341 a = (Pixel>>24); \ |
| 0 | 342 } |
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343 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 344 { \ |
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345 r = (Pixel&0xFF); \ |
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346 g = ((Pixel>>8)&0xFF); \ |
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347 b = ((Pixel>>16)&0xFF); \ |
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348 a = (Pixel>>24); \ |
| 0 | 349 } |
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350 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 351 do { \ |
| 352 switch (bpp) { \ | |
| 353 case 2: \ | |
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354 Pixel = *((Uint16 *)(buf)); \ |
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355 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 356 break; \ |
| 357 \ | |
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358 case 3: { \ |
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359 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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360 r = *((buf)+fmt->Rshift/8); \ |
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361 g = *((buf)+fmt->Gshift/8); \ |
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362 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 363 } else { \ |
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364 r = *((buf)+2-fmt->Rshift/8); \ |
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365 g = *((buf)+2-fmt->Gshift/8); \ |
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366 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 367 } \ |
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368 a = 0xFF; \ |
| 0 | 369 } \ |
| 370 break; \ | |
| 371 \ | |
| 372 case 4: \ | |
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373 Pixel = *((Uint32 *)(buf)); \ |
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374 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 375 break; \ |
| 376 \ | |
| 377 default: \ | |
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378 Pixel; /* stop gcc complaints */ \ |
| 0 | 379 break; \ |
| 380 } \ | |
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381 } while (0) |
| 0 | 382 |
| 383 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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384 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 385 { \ |
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386 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 387 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 388 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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389 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 390 } |
| 391 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 392 { \ | |
| 393 switch (bpp) { \ | |
| 394 case 2: { \ | |
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395 Uint16 Pixel; \ |
| 0 | 396 \ |
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397 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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398 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 399 } \ |
| 400 break; \ | |
| 401 \ | |
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402 case 3: { \ |
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403 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 404 *((buf)+fmt->Rshift/8) = r; \ |
| 405 *((buf)+fmt->Gshift/8) = g; \ | |
| 406 *((buf)+fmt->Bshift/8) = b; \ | |
| 407 } else { \ | |
| 408 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 409 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 410 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 411 } \ | |
| 412 } \ | |
| 413 break; \ | |
| 414 \ | |
| 415 case 4: { \ | |
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416 Uint32 Pixel; \ |
| 0 | 417 \ |
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418 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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419 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 420 } \ |
| 421 break; \ | |
| 422 } \ | |
| 423 } | |
| 424 | |
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425 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 426 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 427 do { \ | |
| 428 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 429 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 430 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 431 } while(0) | |
| 432 | |
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433 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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434 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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435 do { \ |
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436 unsigned tR, tG, tB, tA; \ |
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437 tA = 255 - sA; \ |
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438 tR = 1 + (sR * sA) + (dR * tA); \ |
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439 dR = (tR + (tR >> 8)) >> 8; \ |
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440 tG = 1 + (sG * sA) + (dG * tA); \ |
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441 dG = (tG + (tG >> 8)) >> 8; \ |
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442 tB = 1 + (sB * sA) + (dB * tA); \ |
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443 dB = (tB + (tB >> 8)) >> 8; \ |
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444 } while(0) |
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445 |
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446 |
| 0 | 447 /* This is a very useful loop for optimizing blitters */ |
|
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448 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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449 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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450 #else |
| 0 | 451 #define USE_DUFFS_LOOP |
|
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452 #endif |
| 0 | 453 #ifdef USE_DUFFS_LOOP |
| 454 | |
| 455 /* 8-times unrolled loop */ | |
| 456 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 457 { int n = (width+7)/8; \ | |
|
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458 switch (width & 7) { \ |
| 0 | 459 case 0: do { pixel_copy_increment; \ |
| 460 case 7: pixel_copy_increment; \ | |
| 461 case 6: pixel_copy_increment; \ | |
| 462 case 5: pixel_copy_increment; \ | |
| 463 case 4: pixel_copy_increment; \ | |
| 464 case 3: pixel_copy_increment; \ | |
| 465 case 2: pixel_copy_increment; \ | |
| 466 case 1: pixel_copy_increment; \ | |
| 467 } while ( --n > 0 ); \ | |
| 468 } \ | |
| 469 } | |
| 470 | |
| 471 /* 4-times unrolled loop */ | |
| 472 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 473 { int n = (width+3)/4; \ | |
|
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474 switch (width & 3) { \ |
| 0 | 475 case 0: do { pixel_copy_increment; \ |
| 476 case 3: pixel_copy_increment; \ | |
| 477 case 2: pixel_copy_increment; \ | |
| 478 case 1: pixel_copy_increment; \ | |
| 479 } while ( --n > 0 ); \ | |
| 480 } \ | |
| 481 } | |
| 482 | |
|
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483 /* 2 - times unrolled loop */ |
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484 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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485 double_pixel_copy_increment, width) \ |
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486 { int n, w = width; \ |
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487 if( w & 1 ) { \ |
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488 pixel_copy_increment; \ |
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489 w--; \ |
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490 } \ |
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491 if ( w > 0 ) { \ |
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492 n = ( w + 2) / 4; \ |
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493 switch( w & 2 ) { \ |
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494 case 0: do { double_pixel_copy_increment; \ |
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495 case 2: double_pixel_copy_increment; \ |
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496 } while ( --n > 0 ); \ |
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497 } \ |
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498 } \ |
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499 } |
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500 |
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501 /* 2 - times unrolled loop 4 pixels */ |
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502 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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503 double_pixel_copy_increment, \ |
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504 quatro_pixel_copy_increment, width) \ |
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505 { int n, w = width; \ |
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506 if(w & 1) { \ |
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507 pixel_copy_increment; \ |
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508 w--; \ |
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509 } \ |
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510 if(w & 2) { \ |
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511 double_pixel_copy_increment; \ |
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512 w -= 2; \ |
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513 } \ |
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514 if ( w > 0 ) { \ |
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515 n = ( w + 7 ) / 8; \ |
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516 switch( w & 4 ) { \ |
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517 case 0: do { quatro_pixel_copy_increment; \ |
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518 case 4: quatro_pixel_copy_increment; \ |
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519 } while ( --n > 0 ); \ |
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520 } \ |
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521 } \ |
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522 } |
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523 |
| 0 | 524 /* Use the 8-times version of the loop by default */ |
| 525 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 526 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 527 | |
| 528 #else | |
| 529 | |
| 530 /* Don't use Duff's device to unroll loops */ | |
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531 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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532 double_pixel_copy_increment, width) \ |
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533 { int n = width; \ |
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534 if( n & 1 ) { \ |
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535 pixel_copy_increment; \ |
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536 n--; \ |
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537 } \ |
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538 n=n>>1; \ |
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539 for(; n > 0; --n) { \ |
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540 double_pixel_copy_increment; \ |
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541 } \ |
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542 } |
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543 |
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544 /* Don't use Duff's device to unroll loops */ |
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545 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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546 double_pixel_copy_increment, \ |
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547 quatro_pixel_copy_increment, width) \ |
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548 { int n = width; \ |
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549 if(n & 1) { \ |
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550 pixel_copy_increment; \ |
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551 n--; \ |
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552 } \ |
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553 if(n & 2) { \ |
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554 double_pixel_copy_increment; \ |
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555 n -= 2; \ |
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556 } \ |
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557 n=n>>2; \ |
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558 for(; n > 0; --n) { \ |
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559 quatro_pixel_copy_increment; \ |
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560 } \ |
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561 } |
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562 |
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563 /* Don't use Duff's device to unroll loops */ |
| 0 | 564 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 565 { int n; \ | |
| 566 for ( n=width; n > 0; --n ) { \ | |
| 567 pixel_copy_increment; \ | |
| 568 } \ | |
| 569 } | |
| 570 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 571 DUFFS_LOOP(pixel_copy_increment, width) | |
| 572 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 573 DUFFS_LOOP(pixel_copy_increment, width) | |
| 574 | |
| 575 #endif /* USE_DUFFS_LOOP */ | |
| 576 | |
| 577 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 578 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 579 #pragma warning(disable: 4550) | |
| 580 #endif | |
| 581 | |
| 582 #endif /* _SDL_blit_h */ | |
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Share code between fill and line drawing
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583 |
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1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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584 /* vi: set ts=4 sw=4 expandtab: */ |